DVD choppy

Philip Walden pwaldenlinux at pacbell.net
Mon Jan 29 22:28:19 UTC 2007


Philip Walden wrote:
> Dotan Cohen wrote:
>> On a recent Dell laptop, what would cause DVD playback to be very 
>> choppy?
> Besides the ATA DMA stuff, you may also want to check whether your 
> MTRR is being set properly by the xorg X server.
>
> Mine looks like this:
>
> cat /proc/mtrr
> reg00: base=0x00100000 (   1MB), size= 256MB: write-back, count=1
> reg01: base=0xfc000000 (4032MB), size=  32MB: write-combining, count=1
>
> You should have at least one "write-combining" entry which means the 
> graphics card is set properly. Otherwise, performance can drop 
> dramatically.
Here is a howto:

http://www.faqs.org/docs/Linux-HOWTO/DVD-HOWTO.html#ss6.1




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